For one year free premium protection, the software must be installed no later than Feb 17, 2017 (German Time). No keys required, just download and install. Also, go to settings > general > popups and turn off the popup ads for other Avast products. Chrome translator is your friend. Enjoy :)
Found via HUKD
I got the same problem though, u ran a full scan but did you tick the "resolve all" button? It required me to subscribe the thing